Error messages don't clear upon successful sync

[zootboy]

Running ICSx 2.1.1 from F-Droid on Android 10 (LineageOS 17.1). I had a calendar subscription lose its DNS record briefly, causing the error text 'Unable to resolve host "<REDACTED>": No address associated with hostname' to appear next to the subscription. After correcting this DNS issue, I forced a manual sync. According to the logcat, it looks like the sync worked, but the error text is still there.

Logcat:

...
09-08 22:45:13.870  8477  8667 I icsx5   : Deleting old events (retaining 81 events by UID) …
09-08 22:45:13.892  8477  8667 I icsx5   : … 0 events deleted
09-08 22:45:13.893  8477  8667 I icsx5   : Calendar sync successful, ETag=null, lastModified=null
09-08 22:45:13.899  8477  8667 I icsx5   : iCalendar file completely processed
09-08 22:45:13.913  8477  8667 I icsx5   : Synchronizing https://<REDACTED>.ics, forceResync=false
09-08 22:45:13.918  8477  8667 I icsx5   : Fetching remote file https://<REDACTED>.ics
09-08 22:45:13.957  8477  8667 I icsx5   : Calendar has not been modified since last sync
09-08 22:45:13.960  8477  8667 I icsx5   : iCalendar file completely processed
...