Decode Error in ChargeParamDisRes if #ConsumptionCost == 3

### Describe the bug

Hi,
I encountered a decode error (-110, EXI_ERROR__ARRAY_OUT_OF_BOUNDS) in a ChargeParameterDiscoveryResponse (ISO-2).
I figured out that it depends on the number of ConsumptionCost elements. If there are 3 of them in the message (the maximum permitted by the specification), I get this error. I'm pretty sure this didn't happen a few months ago. Maybe one of the last PRs is responsible for that?
I have not investigated this problem any further yet.

### To Reproduce

Example Message:

EXI `8098022AAAAAAAAAAAAAAA90A000001200003403C18501E088000454D85B195CC815185C9A5999880D4D400C0D8040141185014000CC18830A02A00051418501600024A4A000010081861E80608284C3A81081209C0018000008000200C0000430441380`

XML

```

AAAAAAAAAAAAAAAA



OK
Finished


10



0
2000


3
W
30




1
Sales Tariff 55
3


600
20



3
W
20


relativePricePercentage
51
0




3
W
21


relativePricePercentage
10




3
W
22


relativePricePercentage
9








0
None
No_IMD
EVSE_Ready


0
A
500


1
W
15000


-1
V
10000


-3
A
0


-3
V
0


-3
A
0


-1
Wh
5000

```

### Anything else?

_No response_