Solana RPC Debugging Expert

I'm looking for an experienced developer to debug an RPC issue we're experiencing on the Solana blockchain. The specific problem is that we can buy but can't sell.

Requirements:
- Proficiency in Solana and its RPC
- Strong debugging skills
- Familiarity with blockchain transactions and potential bottlenecks
- Ability to analyze and troubleshoot without explicit error messages or logs

Ideal Skills:
- Background in blockchain development
- Experience with Solana's ecosystem
- Problem-solving and analytical skills