2 Factor Authentication (2FA) is not working properly on my iPhone TM Password Manager (PWM) app; iOS v16.7.10 on iPhone 8 Plus. 

After entering my username & password (both confirmed correct) to Sign In to TM My Account in preparation to sign in to PWM, and after successful receipt of a designated SMS with the 2FA code, then returning to the PWM sign-in screen to enter the code, the PWM sign-in screen immediately returns to the start of Sign In, without providing an opportunity to enter the received 2FA code. 

Thus, it is not possible to complete the 2FA sequence, and sign in has become impossible.

The only way I could complete my sign in to PWM on my iPhone, was to sign into PWM on Windows 10, disable 2FA, then sign in to PWM on my iPhone without 2FA, and finally re-enable 2FA. This will last as long as I can remain signed-in to PWM on my iPhone - I am aware that forced re-signing into the TM account before activating PWM recurs from time to time.

Can anyone advise what I need to do to rectify the issue?