I have encountered a bug that when you attack and use your donated troops, after the battle you cannot request troops again - the game starts time for renewal of requesting troops command at the time you attacked. Therefore you face up to 17 minutes of no troops request after your attack... Please fix it.
You'll generally find that exiting and reentering the game will resolve this. But yes, I have encountered what you describe before and needs fixing. I believe it's due to connectivity issues - similar to the game thinking there is no rumble in progress when you launch the game (but usually it shows up eventually)