Google Apps. UnlockCapcha several times a day

Question

Google Workspace

I have an account with Google Apps For Domain. Free.
Two-Step Verification is enabled. Application passwords have been created.
The password is brute-force, changed recently.
Connections occur from several devices: tablet, phone, laptop.
Recently, such a story has begun: several times a day, applications (mail, calendars) say that the password is not suitable.
According to the recommendation on the Google forum, I go to the address: https://accounts.google.com/UnlockCaptcha
After that, for a while, everything becomes fine.
After a while (an hour or two) history repeats itself.
I tried to change passwords for applications. I tried changing the master password.
Does not help.
Maybe someone came across? How to deal with it?