I'm able to use the Retouch tool after straightening a photo without issue.
As a test launch Photos with the Option key held down and create a new, test library. Import some photos and test to see if the same problem persists. Does it? This tells us if the problem is limited to your current library or is more wide spread.
If it persists in the test library try this: log into a new, basic, admin user account, Set up users, guests, and groups on Mac, crest a test library and see if the problem persists. This tells us if the problem is limited to your user account or is system wide.
If the problem does not exist in the other user account boot into Safe Mode according to How to use safe mode on your Mac, test to see if the problem persists, reboot normally and text again
Note: if you have a wireless keyboard with rechargeable batteries you should connect it with its charging cable to assure a boot into Safe Mode or the Recovery volume.
