I also had this problem in the past. do you use gmail or Outlook?
because this problem happens a lot when the person uses Outlook email and it hardly happens when the person uses gmail, so I stopped using Outlook email and started using gmail to log into my blockchain.com account
their support is very bad, it seems that they know nothing. I was even more nervous every time the support answered me, and worse Is that when they disable 2FA it takes time for the person to see that 2FA is really not working anymore, in my case it took 30 days to solve my problem so I stopped to use blockchain.com
because this problem happens a lot when the person uses Outlook email and it hardly happens when the person uses gmail, so I stopped using Outlook email and started using gmail to log into my blockchain.com account
...only support could help you with this issue.
their support is very bad, it seems that they know nothing. I was even more nervous every time the support answered me, and worse Is that when they disable 2FA it takes time for the person to see that 2FA is really not working anymore, in my case it took 30 days to solve my problem so I stopped to use blockchain.com
I use protonmail as a webapp. Do you think thats the problem?