FitNesse: Intermittent issue clearing record user filter

Using code similar to the following I'm finding that record user filters are not always clearing.

|populate record type user filter|Filter1|with|Value|
|clear record type user filter   |Filter1           |
|populate record type user filter|Filter2|with|Value|
|clear record type user filter   |Filter2           |

Watching the script execution I can see that the field is focused and FitNesse tries to do something the clear fails.
Sometimes it throws the following error "clear record type user filter An error has occurred: User Filter" but there is no more details on the cause

FitNesseForAppian Release v20.2.1
FitNesse Release v20200501