Yep, 2.5" is the maximum I'd run on the front but I prefer a 2.4", 2.4" on the back is the maximum for me too.
The Bonty XR casings are very light, and can feel nervous accordingly IMO. The sidewalls offer little support and at very lower pressures like you're running the front will likely be rolling around quite a bit and leading to a feeling of squirming/vagueness.
With larger tyre volumes like a 2.6", they are very fussy about tyre pressure too (
@Mattyp). Too low and they roll around a lot, too high and they tend to bounce off things as they're like an undamped spring. Unfortunately the difference between the two might only be 2psi. This is exaggerated by lighter tyre casings, as there's no "mechanical" support from a burlier sidewall.
IMO - I prefer wider rims (like a 35mm internal width) for 2.5/2.6" tyres, as it stops the tyre wanting to roll under while cornering so much - but ultimately think a better compromise all round is with 2.4's on 29/30mm IW rims (I could seed 2.5's working better with thicker casings, but that doesn't sound like what you're looking for). 2.4's just feel a bit more precise and controlled (again, IMO), and a bit easier to find your "goldilocks" pressures.