i don't know were to report bugs so i will do that here
bug 1 the speed up graphic doesn't reset at game start
bug 2 the first time you equip a shield the effect is permanent
bug 3 some of my ships wont shoot the bigger enemy ships
Thanks for the bug report. For bug 1: Is it just the graphic but the speed resets? Because based on feedback I did make the new wave start at speed 3, if you had it there last wave. That's deliberate.
Bug 2 has been worked on; it will be fixed in the next patch. Bug 3 is still being investigated. I have troubles reproducing it.