You don't say which sim you use but, if you use FSX or P3D 32 bit, as I suspect, that's to be expected, but uou can the following to minimize pauses on FSX:
- Raise the Anti-pop setting in the Addon Manager menu. Note that, you will risk Out of memory errors if you do this, but it will surely reduces pauses.
- Disable the "compensate object altitude", from the CTRL+F12 menu for Charlotte.