Just like in Well of Radiance. Bubble is made near totally worthless when you can easily get frozen and melee killed instantly. Just make it so that when you have the "Armor of Light" buff (only available when inside of a bubble), you can't be slowed or frozen. You already can't shoot out of it, so at least make it somewhat more of a defensive super.
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I think solar is the exact opposite of stasis and that's the part that causes you to not be affected by stasis...vs void. I recall them mentioning it in a twab/update some time back. In general, so many issues while casting super, during super, etc...with suppressions/freezes/strand... 🤷🏻♂️