I am running odoo 14 enterprise and am facing the issue that since a few weeks the system is not asking for backorders anymore when trying to validate a partially completed transfer. When clicking "validate", nothing happens, no popup, no error and the transfer does not change state. Previously backorders worked just fine, however i cannot trace when exactly the issue started appearing and what could have caused the issue.

I tried enabling error logging and looking into the odoo log file but could not find anything showing the reason for this behaviour. 

Did anyone encounter this issue before?