Different problems in ingress because of changing account in ingress
in Report a Bug
2 years ago I changed gmail linked to hpwu(the original one was linked to ingress also). So in this period till 20th of May 2021 I had a possibility to log in and play from 2 gmails(original and new). I reported about the problem to support from the both gmails 3 times at least and they said everything is OK. Now they "fixed" it and I had multiple bugs, the main - support is quite, I guess they don't get my messages. So I ask to fix it to give me a chance to describe "my accounts specific issues" directly from the game
A few weeks ago, Niantic changes something which affected people that had a duplicated login method, just like you described. If the issue persists, please contact @NianticPooja on Telegram under the handle @Suivezmoi. She has been amazing and worked together with affected agents to get their accounts fixed.