I am using an iPhone X, i believe I have the 821lm MyQ. My wife, using an iPhone 6plus, reports no such issues opening and closing.
Since your garage door is experiencing interference in opening at night, its likely that an LED light is interfering with the signal due to radio frequencies.
- Unplug the LED bulbs.
- Test the remotes. Is there still an issue?
- Yes, continue troubleshooting.
- No, replace the LED lights with a different brand or a different type of bulb.
These LED lights have been tested and we found that they did not interfere with our garage door openers:
60w (equivalent) - Phillips 462481
100w (equivalent) - GE LED17DADL9-HT2
Let us know if that helps resolve the issue or if you require further assistance. We are happy to provide further information as needed.