cooldown Between getting new turrets as Heimer sometimes disapears [GAMEPLAY]

I play pretty much exclusively Heimerdinger and i rely pretty heavily on knowing when I'm going to get my next turret in a team fight if ive already placed all the ones i have however since the most recent patch (7.11) sometimes halfway through the game i will no-longer see the how long until my next turret i only see how many are stored.

I'm going to try to explain it a little better, Heimer has 2 cooldowns on His Q, the first one is how quickly you can placed the turrets you have stored down and the other is how often you store another turret. The cooldown for how quickly you can place them is what takes the spot of where the cooldown for most abilities go The cooldown for how often you store turrets is located on the same bar that blue buff, red buff, baron, etc are The cooldown for how often you store turrets looks similar to how teemo shrooms look where it shows the cooldown of getting the shrooms and then a small number in the corner of how many summons are ready. The bug is that sometimes the cooldown part for how long until you store another turret just stops showing you the cooldowns and only shows you the quantity of turrets you have.

Now i wish i could tell you why it happens or what leads to it but if I'm being honest I'm not really sure it seems to happen sporadically with no obvious pattern as to when it is likely to occur however if i notice a pattern as i continue to play i will edit the post.

Note: this is my first time posting to the forums so if ive made a mistake or done something wrong let me know

edit: it happened to me with the cooldown between stacks of relic shield aswell so it seems not to be heimerdinger problem so much as a problem with cooldowns on buff icons