Problem with subform not being populated

I a using LO I have a Base 6.6.7.3 on Ubuntu 18.04. I have a Base form that hase been working fine until the last update of LO. This is a subform of a subform form. LO Base populate this before the upgrade. Now it doesn’t. I have checked the Form and the Control and everything is correct. Is this a bug?

Hello,

Please provide: correct LO version, version upgraded from, database being used, sample of problem. Where is your LO from? PPA, distro, TDF?

Looking back at your other questions, it appears you are using MySQL and you have updated from LO v6.0.6.2 to v6.0.7.3.

I have been using LO Base with MySQL for years now on almost a daily basis. This on Mint 18.3 (have used on various Ubuntu installs) currently with LO v 6.1.4.2 (TDF) and have multiple forms with varying levels of sub forms as you state. Have had no such problems. Need more info on your problem. Error generated?