diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ee4b667635..c26ff45a644 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# 0.1.9 - Jan 26, 2026 - "Electrum Confirmations"
+
+## Bug Fixes
+ * The presence of unconfirmed transactions no longer causes
+   `ElectrumSyncClient` to spuriously fail to sync (#4341).
+
 # 0.1.8 - Dec 2, 2025 - "Async Update Completion"
 
 ## Bug Fixes
diff --git a/ci/ci-tests.sh b/ci/ci-tests.sh
index 95d2c9ad449..56fc45d753c 100755
--- a/ci/ci-tests.sh
+++ b/ci/ci-tests.sh
@@ -17,6 +17,18 @@ function PIN_RELEASE_DEPS {
 	# Starting with version 1.39.0, the `tokio` crate has an MSRV of rustc 1.70.0
 	[ "$RUSTC_MINOR_VERSION" -lt 70 ] && cargo update -p tokio --precise "1.38.1" --verbose
 
+	# Starting with version 1.0.104, the `proc-macro2` crate has an MSRV of rustc 1.68
+	[ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p proc-macro2 --precise "1.0.103" --verbose
+
+	# Starting with version 1.0.146, the `serde_json` crate has an MSRV of rustc 1.68
+	[ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p serde_json --precise "1.0.145" --verbose
+
+	# Starting with version 1.0.16, the `itoa` crate has an MSRV of rustc 1.68
+	[ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p itoa --precise "1.0.15" --verbose
+
+	# Starting with version 1.0.21, the `ryu` crate has an MSRV of rustc 1.68
+	[ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p ryu --precise "1.0.20" --verbose
+
 	return 0 # Don't fail the script if our rustc is higher than the last check
 }
 
@@ -62,6 +74,7 @@ pushd lightning-tests
 [ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p syn --precise "2.0.106" --verbose
 [ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p quote --precise "1.0.41" --verbose
 [ "$RUSTC_MINOR_VERSION" -lt 65 ] && cargo update -p regex --precise "1.9.6" --verbose
+[ "$RUSTC_MINOR_VERSION" -lt 68 ] && cargo update -p proc-macro2 --precise "1.0.103" --verbose
 cargo test
 [ "$CI_MINIMIZE_DISK_USAGE" != "" ] && cargo clean
 popd
diff --git a/ci/ci-tx-sync-tests.sh b/ci/ci-tx-sync-tests.sh
index 5f926a8e37b..116e2c03880 100755
--- a/ci/ci-tx-sync-tests.sh
+++ b/ci/ci-tx-sync-tests.sh
@@ -20,6 +20,9 @@ PIN_RELEASE_DEPS # pin the release dependencies
 # Starting with version 1.2.0, the `idna_adapter` crate has an MSRV of rustc 1.81.0.
 [ "$RUSTC_MINOR_VERSION" -lt 81 ] && cargo update -p idna_adapter --precise "1.1.0" --verbose
 
+# Starting with version 2.12.1, the `indexmap` crate has an MSRV of rustc 1.82.
+[ "$RUSTC_MINOR_VERSION" -lt 82 ] && cargo update -p indexmap --precise "2.11.4" --verbose
+
 export RUST_BACKTRACE=1
 
 echo -e "\n\nChecking Transaction Sync Clients with features."
diff --git a/lightning-transaction-sync/Cargo.toml b/lightning-transaction-sync/Cargo.toml
index 8256a44ded5..fc0a389be67 100644
--- a/lightning-transaction-sync/Cargo.toml
+++ b/lightning-transaction-sync/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lightning-transaction-sync"
-version = "0.1.0"
+version = "0.1.9"
 authors = ["Elias Rohrer"]
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/lightningdevkit/rust-lightning"
diff --git a/lightning-transaction-sync/src/electrum.rs b/lightning-transaction-sync/src/electrum.rs
index 78fca1b168f..a442ff9e119 100644
--- a/lightning-transaction-sync/src/electrum.rs
+++ b/lightning-transaction-sync/src/electrum.rs
@@ -336,10 +336,21 @@ where
 						script_history.iter().filter(|h| h.tx_hash == **txid);
 					if let Some(history) = filtered_history.next() {
 						let prob_conf_height = history.height as u32;
+						if prob_conf_height <= 0 {
+							// Skip if it's a an unconfirmed entry.
+							continue;
+						}
 						let confirmed_tx = self.get_confirmed_tx(tx, prob_conf_height)?;
 						confirmed_txs.push(confirmed_tx);
 					}
-					debug_assert!(filtered_history.next().is_none());
+					if filtered_history.next().is_some() {
+						log_error!(
+							self.logger,
+							"Failed due to server returning multiple history entries for Tx {}.",
+							txid
+						);
+						return Err(InternalError::Failed);
+					}
 				}
 
 				for (watched_output, script_history) in
@@ -347,6 +358,7 @@ where
 				{
 					for possible_output_spend in script_history {
 						if possible_output_spend.height <= 0 {
+							// Skip if it's a an unconfirmed entry.
 							continue;
 						}