On Simnet, in at-block, burn-block-height returns the highest latest value, not the value on that block

[0xc22b]

Describe the bug
On Simnet, in at-block, burn-block-height returns the highest latest value, not the value on that block

To Reproduce
Steps to reproduce the behavior:

1. Run clarinet console with a smart contract below.

(define-read-only (get-burn (height uint))
    (let
        (
            (id (unwrap! (get-stacks-block-info? id-header-hash height) err-invalid-args))
        )
        (at-block id
            (ok { burn-block-height: burn-block-height, stacks-block-height: stacks-block-height })
        )
    )
)

2. Run ::advance_burn_chain_tip 1 repeatedly
3. Call the smart contract with different heights

(contract-call? .contract get-burn u3)

Expected behavior
burn-block-height should return the height for that at-block

Screenshots

Environment (please complete the following information):

• OS (version): macOS (14.7)
• Clarinet version 2.11.2

[jbencin]

I tried reproducing this today. It does not happen in the default Epoch (2.05) and only happens in Epoch 3.0, so the full steps to reproduce are:

1. ::set_epoch 3.0
   

2. (define-read-only (get-burn (height uint))
       (let
           (
               (id (unwrap! (get-stacks-block-info? id-header-hash height) (err 1)))
           )
           (at-block id
               (ok { burn-block-height: burn-block-height, stacks-block-height: stacks-block-height })
           )
       )
   )

3. ::advance_burn_chain_tip 100
   

4. (contract-call? .contract-0 get-burn u3)

Which returns:

(ok { burn-block-height: u101, stacks-block-height: u3 })

The problem is that burn-block-height is calculated differently in Epoch 3.0, in a way that doesn't take into account the context set by at-block