While I couldn't entirely reproduce this issue, I found a few points worth to share:
Seems the issue is caused by autocomplete feature in Google App.
Searching using autocomplete
When you start a search on Google, you can find the information you're
looking for faster using search predictions. Search predictions are
possible search terms you can use that are related to the terms you're
typing and what other people are searching for.
How autocomplete works
Predictions are made based on factors, like the popularity and freshness of search terms. When you choose a prediction, you do a search using the term you selected.
Where search predictions come from
The terms you're typing.
Relevant searches you've done in the past (if you're signed in to your Google Account and have Web & App Activity turned on).
What other people are searching for, including Trending stories . Trending stories are popular topics in your area that change throughout the day. Trending stories aren't related to your search history.
Here's what Google says about autocomplete feature:
Search predictions aren't the answer to your search. They're also not
statements by other people or Google about your search terms.
Change autocomplete settings
If you're using the Google app on an Android device, you can turn off Trending stories .
- Open the Google app .
- At the top left, tap Menu Settings Autocomplete .
- Tap the switch to turn "Show trending stories" off or on.
What can't be changed
Other than Trending stories, you can't turn off search predictions.
Search predictions are built into Google Search to help you find
information faster and easier. You can always choose not to use search
As I suggested in comments it maybe a feature associated with newer Google Chrome version, together with new features in Google App.
I suggest, who also check related settings in Google Chrome and look for any options suggesting autocomplete behaviour.
In addition look for any odd history and cache, delete the unnecessary entries, in these Apps as well as when logged in to your Google account
Hope this helps
Search using autocomplete
BY default Google stores most of the users's activity in the My account section of Google account.
Here Google collects bits of information based on the user's activity (e.g played youtube videos, location history, browsing and search history)
The information is stored (even without consent) in order to improve user experience - at least that's Google best explanation of this annoying behaviour.
To find out any previous data collected, or at least gain some control over your account, you need to navigate to the "My activity section of My account
here you find most of the stored data, cache etc,and deleted these and also control what data is collected. ( I believe this is the cause for annoying predictions based on previously or commonly visited websites)
I managed to collect samples of the My activity section:
For multiple accounts, Google claims the default account may get to store more of this user data activity:
Carefully review this "collected data" be sure to delete any details you no longer need, I suggest remove everything no longer needed, clear the cache and start afresh. Do it for all Google accounts stored in device
Check if you still see this.