Improperly displayed text on resource pack switching

After switching to a resource pack and back again, the text in all fields (even in game) are messed up and convoluted. This is not caused by the resource pack itself, but rather by the very switching of resource packs. It is possible to recreate this bug by downloading and installing ANY resource pack, switching to it, and then back to the default pack. It seems to only happen every other game start.