Replace Speedlock message "Hack acquired no items" with more informative like "Speedlock Activated."
Got over 20 times a message "Hack acquired no items" when repeatedly hacking the same friendly portal very quickly. No "Portal burned out", "Portal Running Hot", "No Location" or "Location Inaccurate" message shown.
There was quite much location jumping even the phone was stationary indoors so assuming the Scanner went to Speedlock state. Location just instantly jumped about 100-150 meters to other place and then after a while it jumped back. No slow location drifting here.
New players may have no idea why they are getting "Hack acquired no items" message several times even from friendly Portal.
The message could be more informative than just "Hack Acquired No Items", something like "Scanner movement too fast. Speedlock Activated."
Samsung S8 Android 9 2.61.3