Yeah, I’ve had the same thing happen to some longer prints which can be frustrating. Improving layer adhesion can help (https://www.youtube.com/watch?v=Bl2ESvtBiLo&t=748s)., but it can be difficult to balance settings for good detail and good adhesion. I’ve also used the springy clips paso_fabri recommended. I like them but sometimes I find the connection has a little too much give. I ended up moving to magnet clips.
The printable scenery ones are great and provide a strong connection, but they require a bit of work.
I also designed my own magnet clips if you want to check them out on thingiverse (https://www.thingiverse.com/thing:3612827). The advantages of these are that they don’t require glue and they automatically line up the polarity of the magnets so orientation doesn’t matter. The magnets are definitely more expensive than the standard clips though. With this clip, however, at least you can reuse the magnets later on. I’m close to updating the thingiverse file with some alternate designs that increase the connection strength and some for ball magnets.
Hope this helps.