After update formula from account was gone (bitnami package)

[iconberg]

We updated from 5.4.5 to 5.5.1 and few days later to 5.5.3, now i see the formula from accounts is gone. I guess it was the update to 5.5.1, lucky these days was not much usage. But this could get really bad. I dont know if other entities are affected to.

[yuri]

It's very unlikely that upgrade removed customizations.

[iconberg]

Ok, i took a wrong look, the formula was there, but not working anymore. I checked an emtpy varchar with
field == ''
and this is not more working.
Changed the parts to
field == None
and it is working again.