Guild Wars 2

I don’t believe this is intended because when I’m interrupted whilst healing with any one character or any other heal skill, it doesn’t go on full recharge.

If this is a bug, please take a look at it guys, it can get quite annoying.

Shelter has 2 parts: Blocking and healing. If a skill bypassed the blocking part to interrupt your healing, the skill is not necessarily interrupted nor if you interrupted the skill yourself, by dodging for example, unless a combat text shows “Interrupted”. Otherwise it goes on full recharge.

It’s working as intended. The reason that channeled skills like Shelter and Renewed Focus go on full recharge when interrupted is because it’s possible for you to interrupt them yourself via dodging and the like. This could lead to abuse, creating situations where Guardians deliberately and repeatedly interrupt these skills to spam the blocking and invulnerability they provide.

While the solution to put them on full recharge doesn’t seem ideal, I’m not sure there’s a better way around it. It’s honestly not that gamebreaking, since these skills will naturally block most interrupts anyways, and I like the fact that you need some situational awareness when using Shelter against Staff Necros or GS Guardians.

It is working as intended as the above people have said.
Remember most skills can be cancelled by the use of escape, this was a really important tactic in GW1 and now in GW2.