The way drones attack is actually quite stupid. There's a sour spot with drones which are fast versus foes which are going between their orbit and MWD speeds.

What they do is get launched.

Then they sit there, often for a full second or two after you tell them to attack (I have a programmable nerd mouse so this is a thumb-click to circumvent the DUMBASS dating sim drone interface).

Then they run at full speed towards the target at 100% MWD speed. Wheeeee!

When they get to the target, they slow down to their orbit velocity. They then try to shoot the foe with their tracking vs the foe's sig, vs their angular velocity.

This works really well for drones attacking something big, slow and sig-bloated. Attacking something way faster than their orbit velocity throws up an anomaly.

In this case they scream in to the target at 100% MWD speed and enter orbit...which is often slower than their foe's speed...so they fall out of orbit with their enemy...at which point, when out of orbit, they begin following at 100% speed again. Wheeeee!

Etcetera etcetera ad infinitum.

If you don't believe me, try,
a) drone nav rigs on a Dragoon and get your Warrior II's to attack a Dramiel or something fast, but nowhere near as fast as the 8.75km/s drones you now have
b) entering a C4 Black Hole and try getting your drones to attack anything which is way too slow for them. Or try recalling them. They will orbit you in spastic rubber-band orbits until you tell them to return and orbit, and then return to drone bay (which causes them to slow down enough to dock with you).
c) doing same with Dragoon in Black Hole. 24km/s Warriors are...utterly munted.

The same will happen, incidentally, if you are going somewhere between the Berserker's max and orbit velocities.

This is also, I have pointed out incessantly to the devs, why web drones are absolutely useless. They are too slow to catch their foes and if they do, they get slower still and don't slow their foes enough to keep their foes with them. So they are forever hitting their sour spot and making themselves look idiotic.