Range must not span multiple lines (Parameter 'range')

[thecodrr]

I am trying to use Omnisharp with Kate Text Editor through their LSP client implementation. However, the semantic tokens implementation fails with this error:

OmniSharp.Extensions.JsonRpc.InputHandler: Failed to handle request textDocument/semanticTokens/range 339 - System.ArgumentOutOfRangeException: Range must not span multiple lines (Parameter 'range')
at OmniSharp.Extensions.LanguageServer.Protocol.Document.SemanticTokensBuilder.Push(Range range, Int32 tokenType, Int32 tokenModifiers)
at OmniSharp.LanguageServerProtocol.Handlers.OmniSharpSemanticTokensHandler.Tokenize(SemanticTokensBuilder builder, ITextDocumentIdentifierParams identifier, CancellationToken cancellationToken) in /home/vsts/work/1/s/src/OmniSharp.LanguageServerProtocol/Handlers/OmniSharpSemanticTokensHandler.cs:line 83
at OmniSharp.Extensions.LanguageServer.Protocol.Document.SemanticTokensHandlerBase.Handle(SemanticTokensRangeParams request, CancellationToken cancellationToken)
at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.g__InnerRoute|5_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
at OmniSharp.Extensions.JsonRpc.InputHandler.c__DisplayClass38_0.b__5>d.MoveNext() | Method='textDocument/semanticTokens/range' RequestId='339'

Kate sends the request for the currently visible portion of the document. It works without an issue with typescript-language-server, clangd & rust-analyzer etc.