Yeah its a 

Bug

Thats's the way it works. Take some time to activate after hit. AfaIk the time correspond to distance

Actually, Hemlock has a short delay before applying Daze effect, but after Daze activates, there's a 1s time which most players use to move quickly to cover. And, unlike Orion. Hemlock's ECM Shot is difficult to fire, and has a high chance of missing it's target at long range. I use Hemlock mostly to get rid of Lancer campers, but those players often abuse the 1s delay (after Daze has been applied). In the worst cases, their teammates kill my Hemlock before I use ECM shot again on the Lancer or other player who tries to attack Hemlock. And once the Lancer camper knows when there's a Hemlock player (usually when they get affected by Daze), then somehow the entire opponent team tries to eliminate my Hemlock. And the 1s delay (due to the bug) helps the Lancer camper to perfectly escape (in some maps) and would spam the game with Savants, Geminis, Tetras and Continuums

Guys as I said, the mech is moving after the Daze is applied, they have a solid purple icon over them and still move. This shouldn't be possible. 

Look at your ping next time this happens. Typically if you have high ping there'll be an extra delay

It's happened to me as well, very annoying! btw. I have the daze implant so it's not that, they just keep moving with the purple icon over their head.

im quite sure that once i was also dazed by hemlock and i just continued to walk and shoot until effect was over.

Im quite annoyed at hemlock all together, i dont get why i apply ability to enemy with purple and yellow implants and they are only frozen for like 3 seconds, while if enemy does it, quite sure without great implants i am frozen for such amount of time that enemy got enough time to ran to me whole map and get a kill while im still in daze and hemlocks arent the fastest mechs.. 

There is for sure things bugged with hemlocks, maybe daze delay does the opposite job of what it should and shortens the daze effect, no freaking idea what they messed up. Like that story with Deathwalker. 

For me i swapped the hemlock to other mech, its very unreliable, sometimes effect applied, sometimes not (same with orion, like if its randomly decides when to do it or not), sometimes its 3 seconds EMP, sometimes i get more time.. If enemy has shield then affect doesnt work.. Zephyr is much better, its reliable, Hemlock is just a box of wonders and surprises, i can not afford such failures in hangar battles, one miss and im dead. So i put vortex back.. id rather have a tank that works instead of supposingly a universal midrange that doesnt.

I haven't experienced those things, perhaps I am lucky, what I have experienced though is how hard it is to apply Daze to a jumping mech, like Lacewing or Lancer, it's like through most of their flight Daze (or Orion's Hunter's Mark for that matter) will not work and it's only towards the end of their flight when if you "shoot" the ability it has a chance of working (not always). Other abilities aren't affected in that way, for example, Parasite can catch you at any point of flight - or perhaps this is just what it looks like when I play Lacewing? Everyone always seems to be able to Daze / Hunter's Mark me whenever I jump lol! 

Yes, and I feel that I'm a little inexperienced lol, because on some maps these jumping mechs have absolute, perfect cover and they just escape from my Hemlock's attack. And on top of it, the entire opposing team turns against my Hemlock and my CPC turns into a 1 vs 5 eliminator suddenly